Melgar, Ricardo, Joaquin Casco, Miquel Méndez, Cristina Sanabria, e Mercedes Figueroa. 1998. “Effectivity of Phosphate Fertilizers for Flooded Rice”. Pesquisa Agropecuária Brasileira 33 (10):1573-79. https://doi.org/10.1590/S1678-3921.pab1998.v33.4998.